Magneto-electric ignition-machine



F. BILLON.

MAGNETO ELECTRIC IGNITION MACHINE. APPLICATION man NOV. 2, 1918.

1,392,554, Patented Oct. 4, 1921.

j we W:

UNITED STATES PATENT OFFICE.

FBEDERIC DILLON, OF SOLOTHURN, SWITZERLAND, ASSIGNOR TO FIRM SCIN'I'ILLA,

OF SOLOTHURN, SWITZERLAND.

MAGNETO-ELECTRIC IGNITION-MACHINE.

Specification of Letters Patent.

Patented Oct. 4. 1921.

Application filed November 2, 1918. Serial No. 260,910.

To all whom it may concern.

Be it known that I, Fnlior'mio BILLON, a cltizen of the Swiss Republic, residing at Solothurn, Switzerland, have invented certaln new and useful Improvements in Magneto-Electric Ignition-Machines, of which the following is a specification.

Tlns invention has for its object to provide very simple and chea means for increasing the secondary vollzage producing the ignition spark in magneto-electric machines and consists in surrounding each of the magnet poles with an insulated short circuit winding. According to this invention this short circuit winding is formed by the pole pieces themselves. For this purpose the pole pieces are fitted as closed bodies to the ends of the permanent magnet in such a manner as to completely surround it.

An embodiment of the invention is shown in the accompanying drawings Figures 1, 2 and 3 in which Fig. 1 shows a longitudinal section through the magnet,

Fig. 2 shows the magnet with the laminations shown in section on the right hand limb thereof and Fig. 3 shows res ectively cross sections on lines A. B and C. l of the magnet, Fig. 2, at the points shown.

In the drawing. m represents the permanent magnet, p the pole pieces. which are preferably made laminated as shown. such pole pieces being arranged around each leg of the magnet m consisting of windings which are insulated from one another, hence they form just as many short circuit windings, which exercise a screening effect against the pulsating of the lines of force in the magnet itself.

This particular construction and arrangement of elements is equally applicable when the permanent magnet is rotatable.

In the embodiment shown in Figs. 1, 2 and 3, the pole pieces are constructed in the form of short circuit windings built .up of closed sheet metal plates mounted on the ends of the magnet m.

I-Vhat I claim is The combination with a permanent magnet of a series of magnetizable plates insulated from one another and each encircling a pole of the said magnet, said plates jointly constituting a pole piece and severally providing short circuited windings about the poles of the said magnet.

In testimony whereof I have signed my name to this specification.

FREDERIC BILLON. 

